unprovoked
From LSJ
ἀσμένῳ δέ σοι ἡ ποικιλείμων νὺξ ἀποκρύψει φάος → glad wilt thou be when night, arrayed in spangled garb, shuts out the light
English > Greek (Woodhouse)
adjective
voluntary: P. and V. ἑκούσιος.
do a thing unprovoked: P. and V. ἄρχειν τινός, or πρότερός τι ποιεῖν.
they attacked us unprovoked: P. ἐπέθεντο ἡμῖν οὐκ ἀδικούμενοι (Thuc. 3, 39).